Restaurant and hotel owners ask this question before every equipment purchase and almost nobody gives them a straight answer. Here is the actual calculation.
The Basic Calculation
Electricity consumption = Wattage × Hours running ÷ 1000 = Units (kWh)
Cost = Units × Your electricity rate per unit
A 10 litre non-insulated milk boiler typically has a 2000 watt heating element. If it runs for 2 hours total across a breakfast service (accounting for cycling on and off to maintain temperature), it uses 4 units of electricity.
At ₹7 per unit (commercial rate in Hyderabad and most of Telangana and AP), that is ₹28 for one breakfast service.
Non-Insulated vs Insulated — The Real Difference
| Non-Insulated 10L | Insulated PUF 10L | |
|---|---|---|
| Element wattage | 2000W | 2000W |
| Daily running time | 2-2.5 hours | 0.4-0.5 hours |
| Daily units consumed | 4-5 units | 0.8-1 unit |
| Daily cost at ₹7/unit | ₹28-35 | ₹5.6-7 |
| Monthly cost (25 days) | ₹700-875 | ₹140-175 |
| Annual cost | ₹8,400-10,500 | ₹1,680-2,100 |
| Annual saving (insulated) | — | ₹6,720-8,400 |
The insulated boiler runs its element for one initial heating cycle only — roughly 25 to 30 minutes to bring 10 litres to temperature. After that, the PUF insulation maintains temperature without any electricity for 4 to 6 hours.
Capacity and Cost
Larger capacity boilers use more electricity per cycle but not proportionally more per cup served:
| Capacity | Element Wattage | Heat time (from cold) | Cost per heating cycle at ₹7/unit |
|---|---|---|---|
| 5L insulated | 1500W | 15-20 min | ₹2.6-3.5 |
| 10L insulated | 2000W | 25-30 min | ₹5.8-7 |
| 15L insulated | 2500W | 30-35 min | ₹8.75-10.2 |
| 20L insulated | 3000W | 35-45 min | ₹12.25-15.75 |
Check Your Electricity Rate
Commercial restaurant electricity rates in India vary significantly by state, city, and sanctioned load. In Telangana (TGSPDCL/TSNPDCL), commercial LT rates typically fall between ₹6.25 and ₹8.50 per unit depending on your consumption slab. Get your current rate from your monthly electricity bill — it is listed per unit consumed.
The Payback Calculation
If an insulated 10 litre boiler costs ₹5,000 more than the non-insulated equivalent, and saves you ₹7,500 per year in electricity, the payback period is:
₹5,000 ÷ ₹7,500 per year = 8 months
After 8 months, every rupee saved is pure benefit — for the 8 to 12 year life of the equipment.
Looking for an Energy-Efficient Milk Boiler?
AV Horeca Solutions stocks the full Pradeep insulated range in Hyderabad. WhatsApp us for a quote and our team will calculate the right capacity and payback period for your specific operation.
📍 Display centre: Nagole, Hyderabad
Same-day delivery in Hyderabad | Next-day across AP and Telangana
Frequently Asked Questions
Does voltage fluctuation affect milk boiler electricity consumption?
Yes. Voltage fluctuations common in commercial areas cause the heating element to work less efficiently. A voltage stabiliser can improve consistency and protect the element. Some commercial milk boilers include built-in stabilisation.
Can I reduce electricity consumption by buying a lower wattage boiler?
A lower wattage element takes longer to heat the same volume. Total energy consumed is similar — it just takes more time. Wattage primarily affects how quickly the boiler reaches temperature, not overall energy efficiency. See our insulated vs non-insulated comparison for the full picture, or browse our milk boiler range.